Vulnerability · Published Jun 30, 2026 · Assigned by NetScaler

CVE-2026-13474Denial of service via malformed HTTP/2 requests

High 8.7

In plain English

A high-severity memory leak in ADC from NetScaler. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.6% (higher than 47% of all known vulnerabilities).

Severity (CVSS 4.0)8.7High

Exploit odds (30 days)0.6%top 53.4% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

Denial of service via malformed HTTP/2 requests in NetScaler ADC and NetScaler Gateway if HTTP/2 is enabled in HTTP Profile and associated with the virtual server (of type LB, CS, VPN) or the service configured on NetScaler

Affected products (as reported)

Vendor	Product	Versions
NetScaler	ADC	14.1 – before 72.6113.1 – before 63.1814.1 FIPS – before 72.6113.1 FIPS and NDcPP – before 37.272
NetScaler	Gateway	14.1 – before 72.6113.1 – before 63.18

Weakness: CWE-401 · Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:L

References

https://support.citrix.com/support-home/kbsearch/article?articleNumber=CTX696604